Webhooks
Send waitlist events straight to your stack
Every signup, confirmation, referral and reward can fire a webhook to your own endpoint, so your product, CRM or data warehouse stays in sync in real time.
Built to be dependable
Smart retries
Failed deliveries retry with exponential backoff, so a brief outage on your side does not lose events.
Delivery logs
Inspect every attempt with the request body, response code and timing, and replay any event.
Pause and resume
Pause an endpoint while you deploy, then resume without losing the events in between.
Signed payloads
Verify that a request genuinely came from SMASHSEND before you act on it.
Event filtering
Subscribe only to what you need instead of handling every event type.
Works with the rest of the API
Pair webhooks with the contacts and forms endpoints to build a full two-way integration.
Frequently asked questions
Which waitlist events can I subscribe to?
Form submissions, email confirmations, referral attributions and reward unlocks, alongside the contact and email events available elsewhere in SMASHSEND.
What happens if my endpoint is down?
Delivery is retried with exponential backoff. Every attempt is logged, and you can replay an event manually once your endpoint is healthy again.
How do I verify a webhook is genuine?
Each request is signed. Verify the signature against your endpoint secret before trusting the payload. The API docs show a worked example.
Wire your waitlist into everything else
Start sending referral and signup events to your own systems today.
Read the docs